xref: /PHP-7.2/ext/dba/dba_db4.c (revision 7a7ec01a)
1 /*
2    +----------------------------------------------------------------------+
3    | PHP Version 7                                                        |
4    +----------------------------------------------------------------------+
5    | Copyright (c) 1997-2018 The PHP Group                                |
6    +----------------------------------------------------------------------+
7    | This source file is subject to version 3.01 of the PHP license,      |
8    | that is bundled with this package in the file LICENSE, and is        |
9    | available through the world-wide-web at the following url:           |
10    | http://www.php.net/license/3_01.txt                                  |
11    | If you did not receive a copy of the PHP license and are unable to   |
12    | obtain it through the world-wide-web, please send a note to          |
13    | license@php.net so we can mail you a copy immediately.               |
14    +----------------------------------------------------------------------+
15    | Authors: Marcus Boerger <helly@php.net>                              |
16    |          Sascha Schumann <sascha@schumann.cx>                        |
17    +----------------------------------------------------------------------+
18  */
19 
20 /* $Id$ */
21 
22 #ifdef HAVE_CONFIG_H
23 #include "config.h"
24 #endif
25 
26 #include "php.h"
27 
28 #if DBA_DB4
29 #include "php_db4.h"
30 #include <sys/stat.h>
31 
32 #include <string.h>
33 #ifdef DB4_INCLUDE_FILE
34 #include DB4_INCLUDE_FILE
35 #else
36 #include <db.h>
37 #endif
38 
php_dba_db4_errcall_fcn(const DB_ENV * dbenv,const char * errpfx,const char * msg)39 static void php_dba_db4_errcall_fcn(
40 #if (DB_VERSION_MAJOR > 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 3))
41 	const DB_ENV *dbenv,
42 #endif
43 	const char *errpfx, const char *msg)
44 {
45 
46 #if (DB_VERSION_MAJOR == 5 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR == 8))
47 /* Bug 51086, Berkeley DB 4.8.26 */
48 /* This code suppresses a BDB 4.8+ error message, thus keeping PHP test compatibility */
49 	{
50 		const char *function = get_active_function_name();
51 		if (function && (!strcmp(function,"dba_popen") || !strcmp(function,"dba_open"))
52 			&& (!strncmp(msg, "fop_read_meta", sizeof("fop_read_meta")-1)
53 				|| !strncmp(msg, "BDB0004 fop_read_meta", sizeof("BDB0004 fop_read_meta")-1))) {
54 			return;
55 		}
56 	}
57 #endif
58 
59 	php_error_docref(NULL, E_NOTICE, "%s%s", errpfx?errpfx:"", msg);
60 }
61 
62 #define DB4_DATA dba_db4_data *dba = info->dbf
63 #define DB4_GKEY \
64 	DBT gkey; \
65 	memset(&gkey, 0, sizeof(gkey)); \
66 	gkey.data = (char *) key; gkey.size = keylen
67 
68 typedef struct {
69 	DB *dbp;
70 	DBC *cursor;
71 } dba_db4_data;
72 
DBA_OPEN_FUNC(db4)73 DBA_OPEN_FUNC(db4)
74 {
75 	DB *dbp = NULL;
76 	DBTYPE type;
77 	int gmode = 0, err;
78 	int filemode = 0644;
79 	struct stat check_stat;
80 	int s = VCWD_STAT(info->path, &check_stat);
81 
82 #if (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR <= 7)  /* Bug 51086 */
83 	if (!s && !check_stat.st_size) {
84 		info->mode = DBA_TRUNC; /* force truncate */
85 	}
86 
87 	type = info->mode == DBA_READER ? DB_UNKNOWN :
88 		info->mode == DBA_TRUNC ? DB_BTREE :
89 		s ? DB_BTREE : DB_UNKNOWN;
90 
91 	gmode = info->mode == DBA_READER ? DB_RDONLY :
92 		(info->mode == DBA_CREAT && s) ? DB_CREATE :
93 		(info->mode == DBA_CREAT && !s) ? 0 :
94 		info->mode == DBA_WRITER ? 0         :
95 		info->mode == DBA_TRUNC ? DB_CREATE | DB_TRUNCATE : -1;
96 #else
97 	if (!s && !check_stat.st_size) {
98 		info->mode = DBA_CREAT; /* force creation */
99 	}
100 
101 	type = info->mode == DBA_READER ? DB_UNKNOWN :
102 		(info->mode == DBA_TRUNC || info->mode == DBA_CREAT) ? DB_BTREE :
103 		s ? DB_BTREE : DB_UNKNOWN;
104 
105 	gmode = info->mode == DBA_READER ? DB_RDONLY :
106 		info->mode == DBA_CREAT ? DB_CREATE :
107 		info->mode == DBA_WRITER ? 0         :
108 		info->mode == DBA_TRUNC ? DB_CREATE | DB_TRUNCATE : -1;
109 #endif
110 
111 	if (gmode == -1) {
112 		return FAILURE; /* not possible */
113 	}
114 
115 	if (info->flags & DBA_PERSISTENT) {
116 		gmode |= DB_THREAD;
117 	}
118 
119 	if (info->argc > 0) {
120 		convert_to_long_ex(&info->argv[0]);
121 		filemode = Z_LVAL(info->argv[0]);
122 	}
123 
124 	if ((err=db_create(&dbp, NULL, 0)) == 0) {
125 	    dbp->set_errcall(dbp, php_dba_db4_errcall_fcn);
126 	    if (
127 #if (DB_VERSION_MAJOR > 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 1))
128 			(err=dbp->open(dbp, 0, info->path, NULL, type, gmode, filemode)) == 0) {
129 #else
130 			(err=dbp->open(dbp, info->path, NULL, type, gmode, filemode)) == 0) {
131 #endif
132 			dba_db4_data *data;
133 
134 			data = pemalloc(sizeof(*data), info->flags&DBA_PERSISTENT);
135 			data->dbp = dbp;
136 			data->cursor = NULL;
137 			info->dbf = data;
138 
139 			return SUCCESS;
140 		} else {
141 			dbp->close(dbp, 0);
142 			*error = db_strerror(err);
143 		}
144 	} else {
145 		*error = db_strerror(err);
146 	}
147 
148 	return FAILURE;
149 }
150 
151 DBA_CLOSE_FUNC(db4)
152 {
153 	DB4_DATA;
154 
155 	if (dba->cursor) dba->cursor->c_close(dba->cursor);
156 	dba->dbp->close(dba->dbp, 0);
157 	pefree(dba, info->flags&DBA_PERSISTENT);
158 }
159 
160 DBA_FETCH_FUNC(db4)
161 {
162 	DBT gval;
163 	char *new = NULL;
164 	DB4_DATA;
165 	DB4_GKEY;
166 
167 	memset(&gval, 0, sizeof(gval));
168 	if (info->flags & DBA_PERSISTENT) {
169 		gval.flags |= DB_DBT_MALLOC;
170 	}
171 	if (!dba->dbp->get(dba->dbp, NULL, &gkey, &gval, 0)) {
172 		if (newlen) *newlen = gval.size;
173 		new = estrndup(gval.data, gval.size);
174 		if (info->flags & DBA_PERSISTENT) {
175 			free(gval.data);
176 		}
177 	}
178 	return new;
179 }
180 
181 DBA_UPDATE_FUNC(db4)
182 {
183 	DBT gval;
184 	DB4_DATA;
185 	DB4_GKEY;
186 
187 	memset(&gval, 0, sizeof(gval));
188 	gval.data = (char *) val;
189 	gval.size = vallen;
190 
191 	if (!dba->dbp->put(dba->dbp, NULL, &gkey, &gval,
192 				mode == 1 ? DB_NOOVERWRITE : 0)) {
193 		return SUCCESS;
194 	}
195 	return FAILURE;
196 }
197 
198 DBA_EXISTS_FUNC(db4)
199 {
200 	DBT gval;
201 	DB4_DATA;
202 	DB4_GKEY;
203 
204 	memset(&gval, 0, sizeof(gval));
205 
206 	if (info->flags & DBA_PERSISTENT) {
207 		gval.flags |= DB_DBT_MALLOC;
208 	}
209 
210 	if (!dba->dbp->get(dba->dbp, NULL, &gkey, &gval, 0)) {
211 		if (info->flags & DBA_PERSISTENT) {
212 			free(gval.data);
213 		}
214 		return SUCCESS;
215 	}
216 	return FAILURE;
217 }
218 
219 DBA_DELETE_FUNC(db4)
220 {
221 	DB4_DATA;
222 	DB4_GKEY;
223 
224 	return dba->dbp->del(dba->dbp, NULL, &gkey, 0) ? FAILURE : SUCCESS;
225 }
226 
227 DBA_FIRSTKEY_FUNC(db4)
228 {
229 	DB4_DATA;
230 
231 	if (dba->cursor) {
232 		dba->cursor->c_close(dba->cursor);
233 	}
234 
235 	dba->cursor = NULL;
236 	if (dba->dbp->cursor(dba->dbp, NULL, &dba->cursor, 0) != 0) {
237 		return NULL;
238 	}
239 
240 	/* we should introduce something like PARAM_PASSTHRU... */
241 	return dba_nextkey_db4(info, newlen);
242 }
243 
244 DBA_NEXTKEY_FUNC(db4)
245 {
246 	DB4_DATA;
247 	DBT gkey, gval;
248 	char *nkey = NULL;
249 
250 	memset(&gkey, 0, sizeof(gkey));
251 	memset(&gval, 0, sizeof(gval));
252 
253 	if (info->flags & DBA_PERSISTENT) {
254 		gkey.flags |= DB_DBT_MALLOC;
255 		gval.flags |= DB_DBT_MALLOC;
256 	}
257 	if (dba->cursor && dba->cursor->c_get(dba->cursor, &gkey, &gval, DB_NEXT) == 0) {
258 		if (gkey.data) {
259 			nkey = estrndup(gkey.data, gkey.size);
260 			if (newlen) *newlen = gkey.size;
261 		}
262 		if (info->flags & DBA_PERSISTENT) {
263 			if (gkey.data) {
264 				free(gkey.data);
265 			}
266 			if (gval.data) {
267 				free(gval.data);
268 			}
269 		}
270 	}
271 
272 	return nkey;
273 }
274 
275 DBA_OPTIMIZE_FUNC(db4)
276 {
277 	return SUCCESS;
278 }
279 
280 DBA_SYNC_FUNC(db4)
281 {
282 	DB4_DATA;
283 
284 	return dba->dbp->sync(dba->dbp, 0) ? FAILURE : SUCCESS;
285 }
286 
287 DBA_INFO_FUNC(db4)
288 {
289 	return estrdup(DB_VERSION_STRING);
290 }
291 
292 #endif
293 
294 /*
295  * Local variables:
296  * tab-width: 4
297  * c-basic-offset: 4
298  * End:
299  * vim600: sw=4 ts=4 fdm=marker
300  * vim<600: sw=4 ts=4
301  */
302